What are the best cold air intake and exhaust system for 2009 sti? anyone?
at the start you didnt point out what style of automobile you have.it somewhat is amazingly important simply by fact some automobiles won't teach plenty, if any progression by using including a chilly air intake.additionally,if its a motor vehicle which will respond properly to a chilly air intake,then danger is that putting headers and a overall performance exhaust will additionally supply you greater power.as far simply by fact the noise point of the exhaust you may decide for a fashion loud you choose for it to be.yet you additionally can could desire to do something with the pcm so as that it may take care of the gas standards which will exchange as a effect of your alterations.
If you don't modify the engine then the stock intake and exhaust is best. If you don't replace the cam, port and polish the heads, and put on a new intake manifold, cold air intakes and larger exhaust systems do next to nothing other than look cool, make noise, and drain your wallet.
I wouldn't suggest getting a Cai because of the risk of sucking in water, and if you want to upgrade to a front mount intercooler down the road you would need a short ram. With that said, you shouldn't run any aftermarket intake on a 2009 without some type of reflash or tune. For the exhaust, if price is no problem check out the exhausts from hks. I'm not sure if they make the carbon titanium exhaust for the 09 but if they do, that's one of the better exhausts you can buy. Now back to the reflash/tune issue. If you just plan on going catback you'll be okay, but if you want to go turboback, were getting back to the issue of doing more harm then good without sometype of reflash at the least. Plus if you really want to make any power with bolt on parts (not that a catback byitself will do much) you really need to reflash your ecu or get a tune. Get something like an accesport, and you'll actually get performance gains from your bolt-ons.
